It's all the more interesting, then, that Augustus understood so much of Sun Tzu while knowing nothing of him. The explanation may lie in a logic of strategy that undergirds cultures--much as grammar does languages--over vast stretches of time, space, and scale. If so, common sense, when confronting uncommon circumstances, may itself be another of the contradictions held simultaneously in the minds of first-rate intelligences. For the practice of principles must precede their derivation, articulation, and institutionalization. You may be looking at clouds, like Polonius, but you'll need to have both feet firmly planted on the ground.